US4322360AExpiredUtility

Process for producing imidazolidone intermediates of biotin

31
Assignee: HOFFMANN LA ROCHEPriority: Apr 6, 1979Filed: Mar 23, 1981Granted: Mar 30, 1982
Est. expiryApr 6, 1999(expired)· nominal 20-yr term from priority
Inventors:Kraft Hohenlohe-OehringenAnton Fliri
C07D 491/04C07D 233/32C07D 495/04
31
PatentIndex Score
0
Cited by
16
References
1
Claims

Abstract

A process is disclosed for producing imidazolidone intermediates from 2H-chromene. The intermediates are useful for synthesizing biotin.

Claims

exact text as granted — not AI-modified
I claim: 
     
       1. A compound of the formula: ##STR14## wherein R 4'   is azidosulphonyl.

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